JP2604644Y2 - Oil level sensor mounting structure for internal combustion engine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a mounting structure of a level sensor for detecting an oil level of an oil pan of an internal combustion engine.

[0002]

2. Description of the Related Art When an oil level sensor for detecting the oil level of an oil pan of an internal combustion engine is attached to the oil pan, there is a structure as shown in FIGS. 4 and 5, for example.

In a side wall 2 of an oil pan 1 made of a damping steel plate or the like, a through hole 4 of a level sensor 3 for detecting an oil level of an oil pan is provided. The level sensor 3 is inserted horizontally via the seal ring 5 until it makes contact. A retainer 7 is applied from the inside of the oil pan 1 so as to surround the main body of the level sensor 3, and gaskets 8 and 9 are provided on both sides of the side wall 2.
The level sensor 3 is fixed by being connected to the retainer 7 by bolts 10 arranged at the four corners of the flange 6 of the level sensor 3 with the interposition.

[0004] Since the side wall 2 of the oil pan 1 is thin, the level sensor 3 cannot be directly connected with the bolt 10, and the bolt 10 is fastened to the retainer 7 disposed on the opposite side with the side wall 2 interposed therebetween. .

For example, when replacing the level sensor 3, the bolt 10
The level sensor 3 can be removed by loosening it and pulling it outward. At this time, another pair of bolts 11 is used so that the retainer 7 does not fall inside the oil pan 1.
This secures the retainer 7 to the side wall 2. Note that these bolts 11 are located on the lower surface of the recess 12 formed in the flange 6.

The level sensor 3 raises and lowers the internal float by the oil level, and detects the height of the oil level on and off.

[0007]

In this way, the level sensor 3 is exchangeably mounted on the oil pan 1. The main body of the level sensor 3 is integrally formed with the flange 6 by a resin such as plastic. In the case of forming the bolt 6 and the sensor main body, the bolt 10 of the flange 6 is connected to the retainer 7 through the side wall 2 depending on the tightening condition. There is a problem that the sealing performance of the portion where the portion penetrates the side wall 2 is reduced, or a crack is generated due to deformation of the sensor main body.

The present invention aims to solve such a problem.

[0009]

SUMMARY OF THE INVENTION The present invention relates to an oil pan .
Across the side wall around the through hole formed in the side wall, the mounting plate is arranged a retainer, the outside to the inside, these retainer
Screw and mounting plate by bolts penetrating the side wall.
While fixed to the flange provided on the level sensors oil-tight manner inserted into the through hole from the outside, the flange portion
It was fixed to a mounting plate around the through hole via a bolt.

[0010]

[Function] The level sensor is independent of the fixing of the retainer.
Only the level sensor is supported with a tightening force necessary for coupling to the mounting plate, so that deformation of the main body of the level sensor is prevented as much as possible, and a good sealing function can always be maintained. Also, the connection between the retainer and the mounting plate can be fixed with the necessary optimum stress,
The sealing performance of the bolt penetrating portion does not deteriorate due to deformation or the like due to excessive tightening force.

When the level sensor is replaced, the level sensor alone can be pulled out while holding the retainer, so that the level sensor can be easily removed from the oil pan.

[0012]

1 to 3 show an embodiment of the present invention.

In the present invention, the level sensor 3 and the retainer 7 are not directly connected to each other.
A metal mounting plate 13 having a hole through which the level sensor 3 can be inserted is disposed outside the gasket, and gaskets 8 and 9 are interposed between the plate 13 and the retainer 7. The level sensor 3 is fixed to the plate 13 by bolts 15.

The level sensor 3 is inserted into the through hole 4 via a seal ring 5, and a diamond-shaped flange 14 is formed outside the level sensor 3.
3 and is connected to the plate 13 by a pair of bolts 12.

With such a construction, the mounting plate 13 connected to the retainer 7 by the bolt 10 is made of metal and hardly deformed. No stress is exerted, and the level sensor 3 is supported with the necessary clamping force to connect only the level sensor 3 to the plate 13 irrespective of the fixing of the retainer 7.

For this reason, the deformation of the main body of the level sensor 3 due to the tightening of the bolts 15 is prevented as much as possible, and a uniform and proper sealing stress is applied to the seal ring 5, so that a good sealing function can always be maintained. . Also, the through portion of the bolt 10 can be fixed with the optimum stress necessary for coupling the retainer 7 and the mounting plate 13, so that the sealing performance of this portion is reduced due to deformation or the like due to excessive tightening force. Not even.

When the level sensor 3 is replaced, the level sensor 3 can be pulled out by loosening the bolt 15, and the level sensor 3 can be easily removed from the oil pan 1 while holding the retainer 7.

The level sensor 3 has a pair of bolts 15
The sensor itself can be reduced in size as a whole because there is only a flange 14 necessary to be able to be fixed to the mounting plate 13 by the above. Since the plate 13 itself has a simple shape, it is separate from the level sensor 3. Even so, improvement in total productivity and reduction in cost can be achieved.

[0019]

According to the present invention as it has been described above devised], Li
The coupling force between the tena and the mounting plate is the main body of the level sensor
Does not generate any stress on the sensor body,
Deterioration of sealing performance due to shape is prevented, and at the same time
While the sealing performance of the bolt penetration part to be held is improved,
The through hole for inserting the sensor almost corresponds to the insertion diameter of the sensor.
Therefore, the oil-tight structure around the sensor and the mounting structure are small.
And the through hole in the side wall has a small diameter so that the sensor
There are few restrictions on the selection of attachment positions.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is an exploded perspective view of the same main part.

FIG. 4 is a sectional view of a conventional example.

FIG. 5 is a front view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Oil pan 2 Side wall 3 Level sensor 4 Through hole 7 Retainer 10 Bolt 13 Mounting plate 14 Flange 15 Bolt

Claims (1)

(57) [Scope of request for utility model registration] 1. Around a through hole provided in a side wall of an oil pan.
With a retainer inside and a mounting plate outside, sandwiching the side wall, and attaching these retainers and the mounting plate to the side wall.
It is fixed to each other by penetrating bolts, while it is
A flange is provided on the level sensor oil-tightly inserted into the through-hole, and this flange portion is attached to a mounting plate around the through-hole.
Oil level sensor mounting structure for an internal combustion engine, characterized in that fixed through the bolts and.